JLG 15AMI Operator Manual - Manual (Page 30)

SECTION 3 - MACHINE CONTROLS & INDICATORS
3-2 – JLG Lift – 3121212
3. MANUAL DESCENT CONTROL VALVE
Machines Built Prior to S/N- 0900019526:
(See Figure 3-1.) This (RED knurled) knob, located on the
electric/hydraulic pump-motor unit on the ground control
station panel provides for lowering of the platform in the
event of an emergency or power failure. Turning the valve
knob to the left (counterclockwise) opens the valve, turn-
ing the valve back to the right (clockwise) closes the valve.
Machines Built Since S/N- 0900019526:
(See Figure 3-2.) The control knob is located in the recess
under the base frame at the rear of the machine. To open
the valve (lower the platform) pull the (RED) knob on the
control, to close the valve (stop platform lowering) release
the valve knob (spring loaded)
Figure 3-1. Ground Control Station.
1. Power On/Off Key Switch
2. Emergency Stop Button 3. Manual Descent Control Valve (a)
4. Hydraulic Oil Reservoir
NOTE: (a) Position of manual descent control valve on machines
prior to S/N-0900019526
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1
3
4